Tire-valve for truck-tires



y L; 0. GIBSON. TIRE VALVE FOR TRUCK TIRES.

APPLICATION FILED'AUGJ |920. K Patented May 3, 1921.

v i vvunlfoz I .LUG/6am m I l s UNITED STATES' LEONARD o. GIBSON, orRAwLINs, WYOMING. e

' Specication of Letters;Patent.l

:TIRE-VALVE ron TRUCK-TIRES.

4 application med August 27, 1920.- `serial No. idees?.

To all whom t may, concern: i.

Be it known-that LLnoNABD O. GIBSON,

' a citizen of the -United States?,- res'iding at Rawlins, in the countyof Carbon, 1n the State of Wyoming, have invented a -new and the.following is a specification.v

The object of my inventionis to provide VAa valvefof novel constructionadapted toj withstand vthe 'heavy air pressure to lwhich valvesfor'truck tiresv are subjected; and to provide the novel-combination andarrange- `ment of parts described. and illustrated. I

attain vthe objects of my invention by the mechanism illustrated 1n theaccompanying drawings, in which- -Figure 1' is a longitudinalsectiompa'rtly Y lin elevation through one of my valves;

valve on line 2--2 of 1;- 4and Fig. 3 is a transverse section throughthe valve-on line-3-'-3 of Fig. 1.

Like numerals designate like p'artsin each of the several views.-

Referring-to the accompanying drawings,4 a valve-shell Qseated onthetire ,Y

and threaded ex'v I provide 1, as shown inFigfl; teriorly andinteriorlyvv'for a portion of its length as shown, and secured to thetirey by Va suitable nutl 3.V I provide a `second valve stem 8threadedxinteriorly andexteriorly' for a portion vtof its length asshown, and having an 'enlarged threaded section 6T adapted, to screwontothe-lower valve shell) valve `seat nut V5v in with the interior threadedportion of lower valve shell 2 and 2. 'I provide -a lower threaded.'engagement chambered toreceive the. frustoj-conical valve '16- which ismounted on a suitable spindle 15` and releasably retained on its seat.by

` a suitable coil spring/1, mounted in the cham'- ber`17 in valve shell2. I provide asimilar .frusto-conicalf valve. 18 `mounted von spindle 12and releasablyv-seated in the chambered portion offvalvenut 11,whichengages the,

.interior threaded ortion 13 of upper valve stem 8 and is re easablyheld on its seat a lsuitable coil spring 9, which bears valve shell '8,and. which guides the releasing pin 19, the ends of which are adapted tobe engaged bythe corresponding ends of the spindlesv 12 and 15respectively when it is necessaryv tounseat the valves 18 and 16 topermit of the escape of air fromthe tire and of air, and provide a valve,adapted towithl y stand lthe heavy-'air pressure required in largetires such as, are ,used on heavytrucks'.

be lobserved' that f i l atentedl-Vlayd, 1921.

.. to permit ofv the' pumping-.clair through The two ,rusto-conicalvalves eii:'ectively. prevent escape of air and are normallyheld ontheir seats bythe springs beneath, but may be released from their seatsby pressure on the upper spindle 12, the lower end of.

which compacts with guidingv pin 119,1which in turn contacts with theendofspindle 15.

ily remove the tire, as the'upperhalfof the valvemay be 'unscrewed andthe vlower half e 'VVith this device it is possible to more readj Fig.2'isa transverse section lthrough the y of the `valve being short maybe-.readily I pulled through the rim. The valves 18 and 16 'are identicalin size and shape'l and are consequently interchangeable, as. vare` alsovspec-tively. Sr'pindles 315 and-12 are of likel length. l What I laim.iszf .l

p 1,111 a' are vaivegadaptd to 'withstand heavy air pressure, .theg.combi'nation of a nuts lland 5, on which the valves seat, re-

valve shell, a second-,val've stem"`relea 'sably both valves.

. lower vvalve stem, nuts ineach 'of the valve secured to .thea-firstvalve' shell, ,-independently disposedV nuts in each ofthe valveyshells, each of saidnuts. having-valve-seats,` valves seated in thenuts, springs lreleasably y. holding'the valves 'on their seats,spindles" on-*which the .valves are mounted and means l operativelyconnecting thes'pindles sfo-that. i pressure on the upper' spindleVwilll unseat-195 y 2. Inj-a device of the vclass described, the

combinationfof a lowervalve shell,`an 4upper valveffshell releasablyengaging.' the 5 1 stemsyeach of said nuts having frusto-conir cal valveseats, frnsto-conical valves releasably mounted *ont* said nseats,spindles on which cachot-said vvalves are .mounted,

lspring means-'normally retaining the valves en -their seats, anda pin,alined with the `spindles of the valves. and of sufficient length toprovide -an operative'connec'tion betweenthe spindles, whereby pressureon the iqoperinost spindle will unseat both the ."valves. "f 4 'deviceofthe class described,

combination of a relatively short lower valve spindle and pin elements`providingl an opshell, a relatively long upper Valve shell reerativeconnection between the two valves leasably engaged on the lowrvalveshell, to permitv of unseating both valves simul- 1ov f nuts havingValve seats mounted in each of taneously, and means for securing thelower the valve shells, interchangeable valves, revalve shell to thetire, substantially as'set silient means normally holding saidv valves,-OIth- .on their seats, and longitudinally alined I LEONARD O. GIBSON.

